Drill-jar.



A. S. CALHOUN.

DRILL JAR.

APPLICATION FILED DEC. 18. 1915.

Patented Mar. 28, 1916.

W findrawfl 5605201417 Vi ANDREW s. CALHOUN, or EAST LIVERPOOL, OHIO.

' DRILL-JAR.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Application filed December 18, 1915. Serial No. 67,687.

. To all whom it may concern:

. of the casing oval or ellipticaL, At 3 is Be it known that 1, ANDREW S; CALHO N, a citizen of'the United States, residing at East Liverpool, in thecounty of Columbiana and State of Ohio, have invented certain new and. useful Improvements inDrill-Jars, of

which the-following is a specification, reference being had therein to the accompanying drawing. V

This invention relates-to drill jars and is in the nature of an improvement upon the device shown and described in LettersPat- .ent No. 1,154,483, granted to me Sept. 21,

The first object of the invention is to provide means to prevent the rotation 'andwabbling of the plunger and at the same time to insure a quick and free action thereof without cramping or binding of the same.

A second object of the invention is to provide a plunger head which will not cushion when it strikes water during its downward movement and thereby retard the eflicient action of the plunger. 7

In the accompanying drawings, Figure 1 is an elevation of the device, partly in section; Fig. 2 is a cross section on the line 22 of Fig. 1, looking in the direction of the arrows; Fig. 3 is a cross section on the line 3-3 of Fig. 1, looking in the direction of the arrows; and Fig. 4 is an inverted perspective view of the plunger head. I

In the embodiment of the invention, as shown in the present drawings, 1 indicates the casing in which the plunger operates, this casing having a chamber 2 therein. The casing here shown is cylindrical in configuration on the outside and oval or elliptical in configuration on the inside. The outside of the casing, however, may conform in configuration to the inside, if desired, thereby making both the outside and the inside shown a socket adapted to receive a reamer,

drill or other tool. An intermediate angular V portionis shown at .4: to receive a wrench.

- The casing has a series of narrow vertically formed slots therein, as shown at 5, these slots'permitting the free circulation of the water or other liquid transversely through the casing and around the plunger. By this arrangement, when the plunger is actuated any water contained in the casing will be thrown outwardly through the slots 5 and thus prevent. the resistance of the water from affecting the free operation of the de- 1 of the head.

vice. The casing terminates in a suitable knock ng head, as shown at 6, this knocking head having an oval or elliptical opening, as

shown at 7 therein." Reciprocating within this opening is a plunger 8 whichcorrespondsin shape with the saidopening'? and .is so mounted therein as to have a free and unobstructed movement therethrough. The

upper end of the plunger'8is provided with the usual head 9 having a'tapered threaded terminal 10 of the usual form to receive the or cable. The head 9 is provided withthe usual angular portionll to receive an oper-' ating Wrench to hold the head while the cableis being coupled thereto. The lower end of the plunger 8 terminates in an enlarged head 12 which, as here shown, is substantially oval or elliptical. The major axis l of this head is substantiallyv equal in length 1 tolthe major aXis of the inside of said casing, thereby insuring aclose fit of the parts, as

theoutside of the head and the inside of the casing. 1t willbe noticed that the slots 5 i within the casing connect these spaces with the outside, the slots facing theelongated sides of the said oval head. It is to be understood, however,that although the drawings show an oval structure it iswithin the scope of the invention to provide guiding means for the head, as shown at-13, and spaces, as shown at lh'without regard to the shape of the'said head or the inside of said casing. The lower portion of this head tapers, as shown at 15, forming a cutting edge, 16 which is substantially of the same length as the major axis of the body portion This tapered portion has tlierein a series of longitudinal grooves or corrugations 17, as shown, and the purpose of which will beset forth later.

In the operation of the device when the head 9 is reciprocated to produce the drilling effect the plunger 8 will be guided in its opening 7, the plunger and opening cooperating to prevent relative rotation thereof but allowing the free reciprocation of the plum ger. The plunger head 12 is also suitably guided, thereby shackle or coupling for the operatingrope preventing I strains from being put upon the plunger, elmininating the cramping thereof and insuring a free and easy movement, as well as preventing As the plunger head reciprocates' the tapered portion thereof will cut through. the water, whereby retardation of the device is prevented owing to the elimination of the rotation.

cushioning effect which would result if the plunger head were flat. The corrugations 17 also. assist in thisoperation and in addition aid'in preventing the rotation of the.

plunger within its casing. If the device is to be employed for actuating a drill, the casing and the socket carrying the drill will operate vertically. WVhere a reamer is used 3 the device willfbe rotated. It is obvious that the parts 1 and 9 can move relatively to each i other in a vertical direction. but :must move together in the saine direction when-the de- 'vice is rotated.

It will beseen thatI have provided a device in which the plunger will reciprocate freely and easily within its opening without rotating or unduly wabbling and in which there will be no danger of the plunger be coming cramped within its opening and thereby causing the same to break. Further- 'more, I have provided a novel head for the plunger which successfully wedges itself through water, forcing the same out through suitable slots. This head also preventsthe rotation of the plunger and keeps it in axial alinement in its opening. Itwill also be 'noted that the plunger works without binding and is loose enough withinthe casing and opening to relieve vibrations. The slots 5, spaces 14 and tapered head 15 all co-- operate to produce a' very eificient and quickly acting devlce.

1. In a drill jar, a casing, a plunger adapted to reciprocate in said caslng. a head i for said plunger, said casing and said. head having; parts cooperatingto prevent the rotation of said plunger, and a portion of said head being spaced from said casing a substantial distance.

2. In a drill jar, a. casing, a plunger "adapted toreciprocatein said casing, said The water is'wedged bythe falling plunger head and. is forced upwardly through the spaces 14' and out through the slots 5.

My device is very durable as thestrains plunger having a head tapering to an edge= at its lower end, and means comprising portions of the head and casing, to prevent the rotation of said. plunger in said casing.

3. In a drlll ar,-a.cas1ng, a plunger adapted: to reciprocate in said C1S1I1g, S11d plunger having a head tapering to an edge at its lower-end, longitudinally extending corrugations on said means comprising, portions of the head and casing to prevent the rotation: or said plunger in 4 said casing;

tapered head, and.

I 4. In a .drilljar, a a casing, a plunger adapted .to reciprocate :in said'cas1ng,'said.

plunger having a .head, and longitudinally extending corruga tionsupon said head.

5.111 a drill; jar, .awcasing, va plungeradapted to reciprocate in said casing, said i tudinally extending ;corrugations upon said head. v

6. In. a drill 'jar, a casing,

a plunger adapted to reciprocate 1n said cas1ng,.sa1d:

plunger having a head tapered atits lower;

end, and longitudinally extendingcorrugm tions' upon said tapered portion:

7. In 1a drill jar,

a casing, a plunger adapted to reciprocate i in said icasing, said. plunger having a head tapering to an edge at its lower end,and longitudinallyextendmg corrugations uponsaid tapered portion;

8. In a drill Ijar, a=cas1ng, a plunger: adapted to reciprocate in. said casing, said, plunger havinga' head, said head taperinga to an edge at its lower end, longitudinally extending corrugations'upon said. head,'said 3 head being spacedifrom said casinga :sub-

stantial distance, means comprising portions 1 of thehead andca sing to prevent the rota-1 tion *Ofi'SZlld plunger and said casing, and

slotslocated in said casing.

9. In a drill jar,a.casing'having a knock-. lng head, an opening in said head,a plunger.

slidably mounted in said opening," means comprlsmg portions of said plunger and said head to preventtherotation of said.

plunger in said opening, .saidplungerhaving ahead at 1ts lower end within the easing, and means comprising portions of the:

plungerhead and casing to prevent the -rotation of theplunger and its head and the cramping of: the plunger within said open ing. 7

10. In a drill jar, a casinghaving an oval interior and aknocking head, an oval opening in said head, an. oval plunger slidablyv mounted in said openings: thereby prevent-.

ing'the rotation of said plunger within said.

3 opening, said plunger having an oval head? at ts lower-end within thecasing, whereby relative rotation between the 'casingv and head is prevented and theplunger iskept in axial alinement, .with prevented from cramping or binding.)

11. In. a drill Jar, a casing havlng anoval its opening. and.

interior and a knocking head, a plunger adapted to reciprocate through an opening in said head, said plunger having an oval head at its lower end in engagementwith the interior of said casing, whereby rotation i9 interior, a plunger adapted to reciprocate in Gopies'oi this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

7 is prevented,

said casing, said plunger having an oval head at its lower end, said oval head being. with the interior of said in engagement casing at its ends, whereby relative rotation and the sides of said plunger head being spaced a substantial distance from the surface of said interior;

In testimony whereof I affix my signature.

ANDREW s. CALHOUN.

Washington, D. 0. 

